Hinge for silo-doors.



i lill@ l HINGE FOR SILO-DOORS.

Specification of Letters Patent.

Application filed September 9, 1915. Serial No. 49,789.

To all whom 'it may concern:

Be it known that I, CHARLES S. MiTCHELL, a citizen of the United States,residing at Grandview, in the county of Yakima and State of Washington,have invented certain new and useful Improvements in Hinges forSilo-Doors, of which the following is a specification.

My invention relates to an improvement in hinges, more particularlyadapted for silo doors, and it consists in four straps and the twomembers of the hinge capable of turning therein, the upper strap on thedoor jamb having an incline, and the lower strap on the door a similarincline so that the gravity assists in closing the heavy door, andswinging it in place.

The invention further consists in certain novel features ofconstruction, and combination of parts which will be hereinafter fullydescribed and pointed out in the claims.

In the accompanying drawings: Figure 'l is a view of the door jambshowing the door opened inward into the silo; Figs. 2

and 3 are horizontal sectional views through the door, jamb and hingeshowing the door both open and closed; and Fig. l is aI detached view inperspective of the hinge and straps, on an enlarged scale.

A is the door jamb, l is the door and'2 is a bar pivoted to the door forholding it fast and air-tight when closed by swinging it from a verticalto a horizontal position where its ends engage the sides of the jambandbdraw the door outward against the door )am The hinge comprises twoparts 3 and 4 Y preferably of wire of suitable size, the two horizontalarms 3 of member 3 terminating in eyes 5, and the horizontal arms 4 ofmember 4 in pintles 6, which enter the eyes 5, and in that way form thehinge connection. Straps 7 and 8 receive the vertical centers of thehinge members and are'em'- ployed as a means for fastening them to theinner face of the door jamb, and to one of the vertical braces 9 on theouter side of the door. The strap 8, 8 each have an incline 10 at anangle of say 45o upon which the upper arm of one member and the lowerarm of the other hinge, ride down as the door is closed, thus gettingthe assistance of gravity in the closing of the heavy silo door. 'Ihedoor in that way virtually closes itself after it is started.

More or less slight changes might be resorted to in the arrangement andform of the several parts described without departing from the spiritand scope of my invention, and hence I do not wish to limit Inyself tothe exact construction herein set forth, but

I claim:

l. A silo hinge comprising two main members, the ends of which areextended at an angle to the main or center portions and hinged together,and straps embracing the central members and within which the latterturn, forming means by which the hinge is attached to the silo and partto be hinged thereto.

V2. A silo hinge composed of two members, the arms of which terminate ineyes and pintles, by which they are pivotally joined, and straps havingoppositely extending inclines at the bearings, down which thearms of thehinge ride in the operation of the hinge.

8. 'Ihe combination of a hinge and door, the hinge comprising twomembers, the center portions of which are vertical and the ends in theform of arms, the arms of one member terminating in eyes and the otherin pintles, and straps for connecting the vertical members to the doorand door j amb, the outer edges of the uppermost and lowermost straps onthe jamb and door having inclines at the bearings upon which theadjacent arm of the hinge turns and rides, whereby the assistance ofgravity is utilized in the closing of the door.

In testimony whereof I aiiix my signature. CHARLES S. MITCHELL.

Witnesses:

A. E. CHAMBERS, W. A. TOWNSEND.

Copies of this patent may be obtained for ve ',cents each, by addressingthe Commissioner of Patents. Washington, D. C.

Patented JT an. 25, llml.

